“From what we know, we would expect to have to replace frames or frame sections, skins, stringers and doublers in the damaged areas.”
“Adhesive bonding, instead of riveting, is employed by some designers for attaching doublers and stiffeners to the skin sheet.”
“In the 1970s DSTO, with the strong support of the RAAF, pioneered the use of bonded carbon and boron fibre doublers to repair cracked metal structures.”